Giving any engine's air intake and exhaust tract a clearer entry (or exit) path is key to making more horsepower. In fact, it's very basic knowledge that any vehicle's air intake and exhaust system ...

The new Cummins X10 will include the first-to-market application of Cummins Valvetrain Technologies’ High Power Density (HPD) ...

As much as we like the 5.9L Cummins powerplant, the stock exhaust manifold is constrictive and contorted, interfering with the flow of gases to the turbo and downpipe. That, in turn, can produce the ...

As good as the 5.9-liter Cummins engine is, it could do with the nicer variable geometry turbo from the newer 6.7-liter. Is it possible to do that?